New Tool for Book Fiends

Google's got a new tool for free use by scholars or anyone with an interest in searching through thousands of books from 1800 to 2000 for words and phrases of interest to them.  The image here is my comparison of the words "memory" and "imagination" over those 200 years.  Note the rise of memory!  It's worth noting that interest rises in an item as it appears that it is fading from use or the culture.  Goodbye, memory!